Valve-seat reamer



F. 0. ALBERTSON.

VLV SEAT BEAMER. APPucmon min manzo. 19:9.

Fatemi, May '18, 1920.

UNITED STATES PATENT OFFICE.

FRANS 0. ALBERTSON, OF SIOUX CITY, IOWAJJKSSIGNOE T0 ALBERTSON & COMPANY, 0F SIOUX CITY, IOWA, A CGIQPORATION 0F IOWA..

VALVE-SEAT BEAMER To all "whom, t may concerny Be it known that I, FRANS O. Anna'rson, y

formerly a subject of the Kin of Sweden, now a naturalized citizen o the United States, residing at Sioux City, m the county of Woodbury and State of Iowa, have 1nvented a certain new and useful Improvement in ValveSeat Beamers, of which the following is a full, clear, concise, and exact description, reference being had tothe acaccompanying drawings, forming apart of this specification. l l

My invention relates to an4 improved reamer especially adapted for the purpose of cleaning and truing up the seats of inter nal combustion engine valve seats to secure tight `fits between said seats and the puppet valves which cooperate therewith. My' 1nvention contemplates the provision of a device of this class that is easy to manipulate,

that is capable of being cheaply manufactured, and one which is so designed that the valve seats may be properly reamed with a minimum' of damage to the cutting edges of the reaming cutter or milling tool. Other advantages of the device of my invention will appear as this specification progresses.

I have found that after having been used for some time, the valve seats of internal combustion engines, and more particularly the exhaust valve seats, become coveredvvith a thin scale, coating or film that is extremely hard, so hard in fact that the valve seat can not be reamed in the usual manner Without considerable injury to the cuttin edges of the reaining device. The formation of this hard scale or film is due, no doubt, to the pounding of the puppet valves on their seats and to theoxidizing action of the hot gases which impinge upon the seats during the operation of the engine. One of the very important features of my invention consists in the novel construction and arrangement and combination of parts, whereby this hard scale or film, which forms on the valve seat, may be removed with a minimum damage to the cutting edges of the reaming device.

My invention illustrated in the accompanying drawings, Wherein Figure 1 a view illustrating the manner of using the device of my invention for the purpose of reamin the exhaust valve seat of an engine cylinr er; y

Fig. 2 is a .view partly in section and Specification of Letters Patent.

Patented May 18, 1920.

Application tiled December 20, 1919. Serial No. 346,377.`

beveled exhaust valve seat B and exhaust valve stem guide (j, both in the present case being formed in one piece with the cylinder casting. At l), l have illustrated internal threads which are designed to coperate in the usual manner with the cage which car ries the intake valve and its seat. ln Fig. 1 these last-mentioned parts und the exhaust valve have been removed for the purpose of permitting access to the exhaust valve seat and the insertion of the valve seat reamer.

The toolof my invention consists of an integral stem or shank 5 which is squared at (5 or otherwise conformed at its upper end so that a suitable wrench or other tool may be applied thereto` The lower end of the shank is preferably of reduced diameter, as shown at 5a, so that the stem may have a working tit in the valve stem guide associated with the valve seat to be reamed. Disposed upon the shank 5 intermediate its `ends and secured thereon conveniently by shown and described being merely representati ve.

Disposed upon the reduced diameter portion of the tool shank is an integral sleeve H comprising three portions, to-wit: the cylindrical and externally threaded upper portion 8, the hexagonal intermediate p01'- tion 8". and the lower portion 8, which tapers downwardly from the hexagonal portion 8 and is provided with external screw threads. The tapered lower portion 8C of the sleeve is moreover provided with a plurality of longitudinal slits or saw-cuts 9 so that the sleeve may be secured in any desired position along the shank portion 5 liv means oi' a elainping nut 1.0. 1t will he understood that with the sleeve 8 disposed upon the shank portion 5 threading of theI nut l() upon the slit tapered lower end 8 el. the sleeve will eause the several tongues eonstituling said tapered lower end to lie l'oreed tightly into engagement with the said shank portion fr.

'threaded upon the. upper portion 8 oi the sleeve is a eap or init l1 wliieh is preferalily externally milled so that it may he grasped hy the lingers and easily nileseoped on and oild the upper sleeve portion 8 for a nirpose now to he explained.

laat us assume that the improved tool ol` my invention is to he used for the purposl o14 roaming the exhaust valve seal l of l"ig` l, the exhaust valve and intake valve rage and parts carried tliereliy havin@r heen re` inoved as illustrated. 'l`lie parts H. lll and l! having lieen reinmed troni the poi'tion 5i of the tool shank, the latter is inserted into the valvi- .steni guides as shown in Fig. l, wliieli, of eourse. permits the rui ting edges ol' the reaining entier to ronninto c-oiilaet with the seat. (`ap ll is threaded upon tlie sleeve portion 8" as fai' as it will go, or substantially as far as it will go1 and the sleeve H is plaired ilpoii the llower end of the shank' portion 5 and slipped upwardly until eap l] engages the lower end of the valvil stem guide. Nut ltl is then applied seeiirely to retain sleeve 8 in position. ('ap 11 is novv threaded pai'- tially ofi' of the upper sleeve portion Fi"A Sinre this operation neeessarily decreases the distanee lietiveeu the` reaming eutter 7 and the rap 1l, and sinee the latter hears against the lower end of the valve stein guide (L the eiitting edges ot' the eutter are eaused lo liite into tlie hard lilin wliieh luis heen Formed on the seat li as previously explained. The rap l] is turned relatively to the sleeve portion H sullieiently to eause the cutting edges of the reauiing (-iitter to :nove entirely through this tliin 'ilni. i\ ivreneil or other suitable tool is now applied to the upper portion of shank 5 and the latter. together with the reainiug eutter 7, is turned to remove the aforesaid seale or lni. The nut 1l heilig aeeessilile is preferably grasped and turned with the shank when the latter is given the very few turns necessary to re move the said seale or film. After the said seale or l'ilm has heen removed from the. valve seat, the parts 8. 10 and ll may either lie removed or the rap ll may he threaded down upon the sleeve portion t4 so that the eap 11 eeases vto hear against the, valve stein guide. Thereafter sueh further roaming ol' the seat as may he necessary oi" desirahle 'is performed in the usual manner hy turning shank 5.

I have t'ound that it' the reaniing eutter is applied te a valve seat that has been in use for soine ti ine, and merely rotated in the usual manner without removing the seule or lilni as just explained. the rotting edges of the reaniing eutter very ipiieldv heroine dull. 'lhe usefulness of the reaining eutter is thus seriously impaired and the reaniing operation is more tedious than when the iniprovi-ments ol' in v invention are employed. l liave'tound that the rotting edges ol' the reaining futter are not apprer-ialilv dulled hy eausing the saine initiaily to eut direetly through the thin sr'ale or oxid ilni as herein deseribed.

llaving thus desi-rilied nrv invention. what l elaiin as new aiid desiieio seeure h v lvnited States Letters l'ateut. is:

l. A valve seat i'eainin; |r tool ol' the elass deserila-d eoinprising a shank rai'rlving 'i reainiiig f'utter intermediate ils ends. that portion o'l' (lie shank lieloiv llie ruiter lieiii; r adapted to lie inserted iii lluialve .stein guide` assoriated with a \'nl\i seat to he reained` and derives ou said shank lieow said eutter arranged to eooperate uitli [lie valve stem guide to eause the eulter edges to liite into the seat` said deviees eonipi'is'ii'ig a sleeve disposed around said shank. said sleeve provided with a f-.vlindrir'al seven threaded upper portion and an externally threaded and .slit eoiiieal lower portieri, a rlamping nut eoi'iperating with said eoniral lower portion arranged to retain said sleeve at any one oi' a. plurality of positions on said shank, and a rap threaded upon the upper portion ol said sleeve arranged to hear against the lower portion of the valve stein guide for the purpose set forth.

2. A valve seat reaniingtool eoniprising u shank eari'ving a rezoningr eutter interme diate its ends` that portion of the shank lielow the eutler heilig adapted to lie inserted in the valve stein guide assoeiated Iwith the valve seat to lie reamed, and deviees on said shank helow said eutter arranged to eoi'iperate with the valve stern guide to oause the cutter edges to lite into the valve seat` said devices eoinprising :i sleeve disposed iiroliiid said shank` means for retaining said sleeve at any one ol' a plurality of positions on said shank. and an adjustable eap threaded on said sleeve and arranged to hear against the valve stein guide. for the purpose set l'drth. i

3. A valve, seat reainiug tool eoinprising n shank earrying a reaniing eutter inter mediate its ends, that portoii of the shank helow the eutter lieing inlapted to he in sorted iii the valve stein guide associated with the valve seat to he reanied` a removalile sleeve arranged to he slipped over the lowei' end of said shank` means for securing said sleevey at any one of a plurality of positions on said shank, and a. device adjustable with i'espeet to said sleeve arranged to bear against the valve stem guide to cause the entier edges to bite into the seat for the purpose set forth.

' valve seat reaming tool comprising a reuming cutter provided with a shank adapted to be inserted in the valve l.stein guide associated with the valve seat-to be reamed, a removable member adapted to be a ppliel to the lower end of said shank, means for securing said removable member at any one of a plurality of positions on said shank, and a device adjustable with respect to said movablemeinber adapted tobear against the valve stein guide to cause the cutter edges to bite into the vulve seat for the purpose set forth.

5. A valve seat reeniing tool comprisingV a roaming cutter provided with a shank adapted t0 be .inserted in the valve stem guide associated with the valve seat to be roamed, a' removable sleeve adapted to slip over the lower'end of said shank, means for retaining said sleeve et a plurality of posi tions on said shank, and .a nut threaded on said sleeve and adapted to bear against the valve stem guide to cause the cutter edges to bite into the valveseat for the prpose set forthP 6. A valve seat reaning tool of the class describef cutter carried Y ada ted to be inserted in the valve stem gni e associated with thevalve seat to be reamed1 and devices on said shank arranged to cooperate with the valve stem guide to cause the cutter edges to bite into the seat, 35

-said devices comprising an 'integral sleeve disposed around Said comprising a cylindrical screw-threaded upper portion, a central nutfand an external y screw-,threaded and slit conical lower por- 40 tion, a clamping nut coperatin conical lower portion arrange( said sleeve at any one of a plurality of positions on said sliank, and a upon the upper portion of said Sleeve ar- 4. ranged to beer against the lower portion -oi" the valve stein guide forth.

comprising. a shank, areaniingf y said shank, sald shan 30 shank, said sleeve with said to retain cap threaded for the purpose set ln witness whereof, l hereunto subscribe :n v neme this i5 day ofDecember, 1919.

FRANS 0. ALBERTSON. Witnesses H. WALTON, GUY R. NEULrrow 

